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Website launched to help find missing college student Mollie Tibbetts

Investigators on Monday rolled out an interactive website to help in the search for a missing Iowa college student who disappeared nearly four weeks ago.

Mollie Tibbetts,
20, was last seen jogging on the evening of July 18 in the small community of Brooklyn, Iowa, an hour east of Des Moines, according to the Poweshiek County Sheriff's Office
. Her family said they reported the University of Iowa student missing the next day after she didn't show up for work at a day care.

Authorities are trying to track Tibbetts' digital footprint and have searched
ponds, fields, farms, barns, and from the air. No credible sightings have been reported.

The website, findingmollie.iowa.gov
, has an interactive map to help jog the public's memory and a link to anonymously provide tips.

"This is just one more avenue for people to take, especially in this digital world that we live in," said Rick Rahn, special agent in charge at the Iowa Division of Criminal Investigation.

Rahn, who declined to reveal details about the investigation, said authorities have received more than 1,500 tips and conducted more than 500 interviews. CrimeStoppers of Central Iowa
has also raised reward money of more than $336,000 from more than 200 donors, according to Rahn.

Authorities said they are considering all scenarios, including the possibility Tibbetts may have come into contact with someone who caused her harm, but are still treating Tibbetts' disappearance as a missing persons case.

"We haven't lost hope. We continue to strive to bring her back home safely. We are not frustrated," Rahn said. "We just are diligent, and we'll continue to do so."